In Birch Bark Roof Is The Phloem Used

When most think of bark covered native homes they think about birch bark.

In birch bark roof is the phloem used.

Birchbark box with lid and bottom of birch wood. The dead cork cells are lined with suberin a fatty substance that makes them highly impermeable to gases and water. Bark formation is initiated by the process of cell division at the cambium which produces xylem on the woody side inside and phloem the primary bark tissue on the exterior bark side. Birch bark designs were also used in beadwork.

Although few native americans in southern new england still make these items from birch bark more recent decorative arts such as splint basket decoration draw upon many patterns developed in birch bark. Until the late 19th century it was the most common roof on rural log houses in norway and large parts of the rest of scandinavia. Removing the bark from a live birch threatens the health of that tree. Birch bark moose elk hunting bugles.

A sod roof or turf roof is a traditional scandinavian type of green roof covered with sod on top of several layers of birch bark on gently sloping wooden roof boards. Again because of the flexible nature of the birch bark it can be used to make game calls for species like elk or moose if your targeted game is a bull elk your call will likely take the form of a long slender tube and for a moose call it would generally be shaped in a long funnel form. A sod roof or turf roof is a traditional scandinavian type of green roof covered with sod on top of several layers of birch bark on gently sloping wooden roof boards. Phloem tissue contains phloem parenchyma bast fibers companion cells and the very important sieve cells or sieve tubes.

The outer bark which is mostly dead tissue is the product of the cork cambium phellogen. Removal of the inner dark layer the phloem kills the tree by preventing the flow of sap to the roots. The inner layer bast or phloem which in scandinavia is referred to as the actual bark have also had its uses specifically for tanning which is the process of treating animal hides and turning them into leather. To prevent it from rolling up during storage the bark should be spread open and kept pressed flat.

Paper birch did provide many northern native folks with a thin flexible and even portable house covering however the natural region of dense paper birch growth is located only in the northern half of the great lakes and new england of the eastern woodlands cultural. Its distribution roughly corresponds to the distribution of the log building technique in the. Until the late 19th century it was the most common roof on rural log houses in norway and large parts of the rest of scandinavia. The inner bark layer the phloem transports sugars produced by photosynthesis throughout the tree.